US5053676A - High-pressure discharge lamp - Google Patents

High-pressure discharge lamp Download PDF

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Publication number
US5053676A
US5053676A US07/597,619 US59761990A US5053676A US 5053676 A US5053676 A US 5053676A US 59761990 A US59761990 A US 59761990A US 5053676 A US5053676 A US 5053676A
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US
United States
Prior art keywords
lamp
capacitor
voltage
gas
outer bulb
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/597,619
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English (en)
Inventor
Gerardus M. J. F. Luijks
Hendrik M. Bleeker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Assigned to U.S. PHILIPS CORPORATION, A CORP. OF DELAWARE reassignment U.S. PHILIPS CORPORATION, A CORP. OF DELAWARE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BLEEKER, HENDRIK M., LUIJKS, GERARDUS M. J. F.
Application granted granted Critical
Publication of US5053676A publication Critical patent/US5053676A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp

Definitions

  • the invention relates to a high-pressure discharge lamp provided with a discharge vessel, which vessel is enclosed with intervening space by an outer bulb having a lamp cap, as well as with an ignition circuit comprising a voltage-dependent capacitor.
  • a lamp of the type described in the opening paragraph is known from German Patent DE-C-3330266.
  • the capacitor is positioned in the outer bulb and provided with a glass envelope to protect it against reduction and evaporation of parts of the capacitor.
  • Practice has shown, however, that this entails major disadvantages.
  • manufacture of a capacitor provided with such an envelope is very difficult, which makes the capacitor very expensive.
  • the known lamp turns out to have a high degree of early failures owing to capacitor breakdown.
  • Positioning of the capacitor in the outer bulb is attractive on account of a relatively simple lamp manufacturing method, caused by, among other factors, the availability of comparatively much space, in contrast to, for example, in the lamp cap.
  • the invention has for its object to provide a means by which the disadvantages described are obviated while a comparatively simple lamp manufacturing method is maintained.
  • this object is achieved in a lamp of the type described in the opening paragraph in that the capacitor is mounted in a gas-filled gas-tight glass capsule in the outer bulb.
  • the advantage of this is that the capacitor is enclosed in a glass housing by means of a technology which has long been known and proved to be suitable, so that production is simple and reliable, which leads consequently to cost reduction in comparison with the known lamp.
  • the gas pressure ensures that dissociation and/or evaporation of components from which the capacitor is built up is counteracted. Gas composition is so chosen that no reactions with capacitor components takes place under the prevailing conditions during lamp operation. Suitable gases are, for instance, rare gases, nitrogen, oxygen, and sulphur-hexafluoride.
  • the gas filling may consist of a single gas, but combinations of gases are also possible.
  • a further advantage of the invention is that the use of the gas-filled gas-tight glass capsule for mounting the capacitor renders the measure according to the invention universally applicable for high-pressure discharge lamps.
  • a further improvement of the lamp can be achieved in that the gas-tight glass capsule is provided with a radiation reflecting layer.
  • the radiation reflecting layer may be applied either externally or internally.
  • the voltage-dependent capacitor is positioned in such a way that the longitudinal axis of the discharge vessel lies substantially in a common plane with the capacitor, which usually has the shape of a disc. Irradiation of the capacitor is thus minimized.
  • a voltage-dependent resistor is connected in series with the capacitor.
  • a further improvement is possible in providing the ignition circuit also with a fuse.
  • FIG. 1 is an elevation of a lamp
  • FIG. 2 is a diagrammatic representation of a circuit formed by the lamp of FIG. 1 together with a stabilizing ballast.
  • FIG. 1 a lamp according to the invention is provided with a discharge vessel 3, which is enclosed with intervening space by an outer bulb 30, which is provided with a lamp cap 31 and with an ignition circuit 10, which comprises a voltage-dependent capacitor 8.
  • the voltage-dependent capacitor 8 is mounted in a gas-filled gas-tight glass capsule 11.
  • the discharge vessel 3 is provided with lamp electrodes 4 and 5, between which a discharge takes place in the operational state of the lamp.
  • Lamp electrode 4 is connected to a lamp contact C of lamp cap 31 via a rigid current conductor 40.
  • lamp electrode 5 is connected to a lamp contact D of lamp cap 31 via a rigid conductor 50.
  • the starter circuit 10 is also provided with a fuse 7 and a voltage-dependent resistor 9.
  • a and B are connection terminals for connecting an AC voltage supply source.
  • Terminal A is connected to lamp contact C via a stabilizing ballast 1.
  • Terminal B is connected to lamp contact D.
  • the ignition circuit 10 formed by the circuit consisting of fuse 7, voltage-dependent capacitor 8 and voltage-dependent resistor 9, together with stabilizing ballast 1 generates in a known manner ignition voltage pulses between the lamp contacts C and D and thus between the lamp electrodes 4 and 5.
  • the discharge vessel 3 may be provided with an external auxiliary electrode as a further ignition aid, as is well known.
  • the lamp was a high-pressure sodium discharge lamp with a power rating of 110 W.
  • the lamp was operated via a stabilizing ballast, type BHL125L, make Philips, at a supply voltage from a 220 V, 50 Hz source.
  • the discharge vessel was provided with an external auxiliary electrode.
  • the ignition circuit was formed by a voltage-dependent capacitor 8, make TDK, which was mounted in a gas-filled gas-tight glass capsule 11.
  • the disc-shaped capacitor was situated at approximately 20 mm from the adjacent end of the discharge vessel and lay substantially in one common plane with the longitudinal axis of the discharge vessel.
  • the gas filling consisted of air which had a pressure of 1 atmosphere at room temperature.
  • the ignition circuit Upon being connected to the 220 V 50 Hz supply source, the ignition circuit generated an ignition voltage pulse of approximately 1000 V approximately 1 ms after each zero passage of the supply voltage. A quick and reliable lamp ignition was the result.

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
US07/597,619 1989-12-06 1990-10-11 High-pressure discharge lamp Expired - Fee Related US5053676A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902999A NL8902999A (nl) 1989-12-06 1989-12-06 Hogedrukontladingslamp.
NL8902999 1989-12-06

Publications (1)

Publication Number Publication Date
US5053676A true US5053676A (en) 1991-10-01

Family

ID=19855749

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/597,619 Expired - Fee Related US5053676A (en) 1989-12-06 1990-10-11 High-pressure discharge lamp

Country Status (6)

Country Link
US (1) US5053676A (de)
EP (1) EP0431696B1 (de)
JP (1) JP3016602B2 (de)
DE (1) DE69013649T2 (de)
HU (1) HU204626B (de)
NL (1) NL8902999A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325017A (en) * 1992-03-27 1994-06-28 U.S. Philips Corporation High-pressure discharge lamp having solid state getter mounted on bimetallic element
US5336974A (en) * 1991-12-23 1994-08-09 U.S. Philips Corporation High-pressure discharge lamp
US5339006A (en) * 1992-03-13 1994-08-16 U.S. Philips Corporation High pressure discharge lamp
US5389856A (en) * 1992-01-17 1995-02-14 U.S. Philips Corporation High-pressure discharge lamp with an integral fuse-capacitor component

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101572423B1 (ko) * 2014-01-21 2015-11-27 주식회사 피티아이 항균 베개 커버 제조 방법
KR101708830B1 (ko) * 2014-02-14 2017-02-21 주식회사 피티아이 항균 및 소취 기능이 구비된 베개 커버 제조 방법 및 항균 및 소취성 베개 커버

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134042A (en) * 1976-09-21 1979-01-09 U.S. Philips Corporation Electric discharge lamp control circuit having a temperature dependent capacitor
US4520294A (en) * 1982-08-23 1985-05-28 Iwasaki Electric Co., Ltd. High pressure metal vapor discharge lamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134042A (en) * 1976-09-21 1979-01-09 U.S. Philips Corporation Electric discharge lamp control circuit having a temperature dependent capacitor
US4520294A (en) * 1982-08-23 1985-05-28 Iwasaki Electric Co., Ltd. High pressure metal vapor discharge lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5336974A (en) * 1991-12-23 1994-08-09 U.S. Philips Corporation High-pressure discharge lamp
US5389856A (en) * 1992-01-17 1995-02-14 U.S. Philips Corporation High-pressure discharge lamp with an integral fuse-capacitor component
US5339006A (en) * 1992-03-13 1994-08-16 U.S. Philips Corporation High pressure discharge lamp
US5325017A (en) * 1992-03-27 1994-06-28 U.S. Philips Corporation High-pressure discharge lamp having solid state getter mounted on bimetallic element

Also Published As

Publication number Publication date
EP0431696A1 (de) 1991-06-12
EP0431696B1 (de) 1994-10-26
DE69013649D1 (de) 1994-12-01
HU204626B (en) 1992-01-28
JPH03250554A (ja) 1991-11-08
NL8902999A (nl) 1991-07-01
DE69013649T2 (de) 1995-05-11
JP3016602B2 (ja) 2000-03-06
HUT55937A (en) 1991-06-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: U.S. PHILIPS CORPORATION, A CORP. OF DELAWARE, NEW

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:LUIJKS, GERARDUS M. J. F.;BLEEKER, HENDRIK M.;REEL/FRAME:005486/0722

Effective date: 19900928

CC Certificate of correction
FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20031001